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networking B

chapter 1 thru 4

QuestionAnswer
class a 1 126
class b 128 191
class c 192 223
number of class a networks 126
maximum addressable hosts per network on class a 16,777,214
number of class b networks > 16,000
maximum addressable hosts per network on class b 65,534
number of class c networks > 2,000,000
maximum addressable hosts per network on class c 254
class a subnet mask 255.0.0.0
class b subnet mask 255.255.0.0
class c subnet mask 255.255.255.0
port 20 ftp data
port 21 ftp
port 22 ssh
port 23 telnet
port 25 smtp
port 53 dns
port 69 tftp
port 80 http
port 110 pop3
port 123 ntp
port 143 imap
port 443 https
smtp simple mail transfer protocol
imap internet message access protocol
tftp trivial file transfer protocol
ntp network time protocol
dns domain name system
arp address resolution protocol
arp a network layer protocol
arp obtains the MAC address and creates a local datbase that maps the mac address to the hosts IP(logical address)
mac physical address of a host or node
host file a text file that associates TCP/IP host names with IP addresses
anycast address IPv6 address that represents a group of interfaces,any one of which can accept a transmission.are designed to be associated with routers
bootstrap protocol application layer protocol
arp table a database of records that maps MAC address to IP address
arp table stored on a pc hard disk,where it is used by arp utility to supply the MAC addresses of network nodes,given their IP addresses.
domain a group of computers that belong to the same organization and part of their IP addresses in common.
dynamic dns ddns client computers are configured to notify a service provider when their IP address change
domain name system/service application layer
dns dns database is distributed over several computers across the internet incase one or two pc go down.
dns a hierarchial way of tracking domain names and their addresses.
dynamic host configuration protocol manages the dynamic distribution of IP addresses on a network.
dynamic ports open for use without requiring administrative privilieges, range from 49,152 thru 65,535
Created by: cgeaski
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